GFR and albuminuria categories, and the 3-month persistence rule

Low filtering rate (below 60) on two results at least 90 days apart; otherwise say what is missing.

Rule and version: kdigo_ckd_2024@1.0 (superseded)
Published source: Kidney Disease: Improving Global Outcomes (KDIGO) CKD Work Group. KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease. Kidney Int 2024;105(4S):S117-S314. Definition: abnormality of kidney structure or function present for more than 3 months; GFR categories G1-G5; albuminuria categories A1-A3. https://kdigo.org/guidelines/ckd-evaluation-and-management/
Edition: KDIGO 2024 guideline, Kidney Int 2024;105(4S):S117-S314 (G/A categories, >3 months)
Effective: from 2024-03-14
Role: persistence phenotype and G/A category
Status: superseded
Clinical reviewer: —
Coding reviewer: —
Sponsor: none
Body hash: 1fce17c4996b68395f0b016f4902d288b7d803a7e1ef8388415c3ea4c347c041

Thresholds and parameters

{
  "a_categories": [
    [
      "A3",
      300.0001
    ],
    [
      "A2",
      30
    ],
    [
      "A1",
      0
    ]
  ],
  "acr_threshold": 30,
  "albuminuria_route": "eGFR >= 60 counts only with urine ACR >= 30 mg/g on two values >= 90 days apart and no ACR < 30 between them",
  "classify_on": "eGFR rounded to report_decimals (what the screen shows)",
  "egfr_threshold": 60,
  "g_categories": [
    [
      "G1",
      90
    ],
    [
      "G2",
      60
    ],
    [
      "G3a",
      45
    ],
    [
      "G3b",
      30
    ],
    [
      "G4",
      15
    ],
    [
      "G5",
      0
    ]
  ],
  "loinc_acr": "9318-7",
  "persistence": "at least two eGFR < 60 whose collection dates are >= 90 days apart, with no eGFR >= 60 between them; stage = G category of the most recent qualifying value",
  "persistence_days": 90,
  "steady_state_exclusion": "LOCAL CONVENTION: creatinine values from an inpatient encounter in which the KDIGO creatinine-change criteria are met under any baseline are excluded from staging, because eGFR equations assume a steady state"
}

Boundary tests: 0/0 pass

None for this rule.